﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace App14._4
{
    /// <summary>
    /// Interaction logic for Window1.xaml
    /// </summary>
    public partial class Window1 : Window
    {
        public Window1()
        {
            InitializeComponent();
        }

        public void OnLoaded(object sender, RoutedEventArgs args)
        {
            SetValue(IsReadOnlyKey, true);

            MessageBox.Show("The value of IsReadOnly property is " +
                IsReadOnly.ToString());
        }

        internal static readonly DependencyPropertyKey IsReadOnlyKey =
            DependencyProperty.RegisterReadOnly("IsReadOnly", typeof(bool),
            typeof(Window1), new PropertyMetadata(false));

        public static readonly DependencyProperty IsReadOnlyProperty =
            IsReadOnlyKey.DependencyProperty;

        public bool IsReadOnly
        {
            get { return (bool)GetValue(IsReadOnlyProperty); }
        }
    }
}
